What term describes an abnormal heart rhythm?

The term that describes an abnormal heart rhythm is dysrhythmia. This term encompasses a range of irregularities in the heartbeat, which can include too fast, too slow, or erratic rhythms. Dysrhythmias can arise from various factors, such as changes in the heart's electrical conduction system, medications, or underlying medical conditions.

Other terms mentioned refer more specifically to certain types of heart rhythms. For example, asystole is a term used to describe the absence of any electrical activity in the heart, essentially leading to a flatline on an EKG. Bradycardia refers to a slower than normal heart rate, typically defined as a heart rate of fewer than 60 beats per minute, while tachyarrhythmia describes a rapid heart rhythm that can be irregular. Dysrhythmia, however, acts as an umbrella term that covers all of these abnormal patterns, making it the most accurate choice in this context.